Cite

[Photograph of a picnic at Founder's Grove]

MLA

[Photograph of a Picnic at Founder's Grove]. 1960. https://collections.library.yale.edu/catalog/2067868.

APA, 6th edition

[Photograph of a picnic at Founder's Grove]. (1960). [Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2067868.